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<FONT color="green">001</FONT>    // Copyright 2010 Waterken Inc. under the terms of the MIT X license<a name="line.1"></a>
<FONT color="green">002</FONT>    // found at http://www.opensource.org/licenses/mit-license.html<a name="line.2"></a>
<FONT color="green">003</FONT>    package org.ref_send.brand;<a name="line.3"></a>
<FONT color="green">004</FONT>    <a name="line.4"></a>
<FONT color="green">005</FONT>    import java.io.Serializable;<a name="line.5"></a>
<FONT color="green">006</FONT>    <a name="line.6"></a>
<FONT color="green">007</FONT>    import org.joe_e.Powerless;<a name="line.7"></a>
<FONT color="green">008</FONT>    <a name="line.8"></a>
<FONT color="green">009</FONT>    /**<a name="line.9"></a>
<FONT color="green">010</FONT>     * An opaque, globally unique identifier.<a name="line.10"></a>
<FONT color="green">011</FONT>     * @param &lt;T&gt; purpose of this brand<a name="line.11"></a>
<FONT color="green">012</FONT>     */<a name="line.12"></a>
<FONT color="green">013</FONT>    public class<a name="line.13"></a>
<FONT color="green">014</FONT>    Brand&lt;T&gt; implements Powerless, Serializable {<a name="line.14"></a>
<FONT color="green">015</FONT>        static private final long serialVersionUID = 1L;<a name="line.15"></a>
<FONT color="green">016</FONT>        <a name="line.16"></a>
<FONT color="green">017</FONT>        protected Brand() {}<a name="line.17"></a>
<FONT color="green">018</FONT>        <a name="line.18"></a>
<FONT color="green">019</FONT>        /**<a name="line.19"></a>
<FONT color="green">020</FONT>         * Constructs an instance.<a name="line.20"></a>
<FONT color="green">021</FONT>         * @param &lt;T&gt; purpose of this brand<a name="line.21"></a>
<FONT color="green">022</FONT>         */<a name="line.22"></a>
<FONT color="green">023</FONT>        static public &lt;T&gt; Brand&lt;T&gt;<a name="line.23"></a>
<FONT color="green">024</FONT>        make() { return new Brand&lt;T&gt;(); }<a name="line.24"></a>
<FONT color="green">025</FONT>        <a name="line.25"></a>
<FONT color="green">026</FONT>        /**<a name="line.26"></a>
<FONT color="green">027</FONT>         * Is one object {@link Object#equals equal} to another?<a name="line.27"></a>
<FONT color="green">028</FONT>         * @param &lt;P&gt;   compared object type<a name="line.28"></a>
<FONT color="green">029</FONT>         * @param a object compared against<a name="line.29"></a>
<FONT color="green">030</FONT>         * @param b object compared to <a name="line.30"></a>
<FONT color="green">031</FONT>         * @return {@code true} if {@code a} claims {@code b} is<a name="line.31"></a>
<FONT color="green">032</FONT>         *         {@link Object#equals equal}, else {@code false}<a name="line.32"></a>
<FONT color="green">033</FONT>         */<a name="line.33"></a>
<FONT color="green">034</FONT>        static public &lt;P&gt; boolean<a name="line.34"></a>
<FONT color="green">035</FONT>        equal(final P a, final P b) { return null != a ? a.equals(b) : null == b; }<a name="line.35"></a>
<FONT color="green">036</FONT>        <a name="line.36"></a>
<FONT color="green">037</FONT>        /**<a name="line.37"></a>
<FONT color="green">038</FONT>         * Requires that one brand is the same as another.<a name="line.38"></a>
<FONT color="green">039</FONT>         * @param &lt;T&gt; purpose of this brand<a name="line.39"></a>
<FONT color="green">040</FONT>         * @param expected  brand compared against<a name="line.40"></a>
<FONT color="green">041</FONT>         * @param actual    brand compared to <a name="line.41"></a>
<FONT color="green">042</FONT>         * @throws WrongBrand   {@code actual} is not {@code expected}<a name="line.42"></a>
<FONT color="green">043</FONT>         */<a name="line.43"></a>
<FONT color="green">044</FONT>        static public &lt;T&gt; void<a name="line.44"></a>
<FONT color="green">045</FONT>        require(final Brand&lt;T&gt; expected, final Brand&lt;T&gt; actual) throws WrongBrand {<a name="line.45"></a>
<FONT color="green">046</FONT>            if (!equal(expected, actual)) { throw new WrongBrand(expected,actual); }<a name="line.46"></a>
<FONT color="green">047</FONT>        }<a name="line.47"></a>
<FONT color="green">048</FONT>    }<a name="line.48"></a>




























































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